Information System Security Officer

Information System Security Officer Job Locations US-MD-Annapolis Junction Requisition ID 2026-169349 Position Category Cyber Security Clearance Top Secret/SCI Responsibilities Peraton is seeking a ISSO to support our customer onsite in Annapolis Junction, MD.

Assist the Information System Security Manager (ISSM) with information assurance efforts, and systems across numerous environments Perform Information System Security Officer (ISSO) roles and responsibilities as prescribed by the JSIG and other applicable regulations Execute and maintain RMF activities (e.g., control implementation oversight, evidence collection, assessment support, POA&M management, continuous monitoring) Maintain security authorization artifacts (e.g., SSP, control narratives, diagrams, inheritance/leverage controls, CM plan, incident handling plan, contingency artifacts, user/admin procedures) Operate continuous monitoring: vulnerability management, config compliance, patching coordination, scan result triage, risk acceptance, and remediation verification Review and approve security-relevant changes through configuration/change control and validate security configurations after major upgrades Support incident response and reporting: participate in investigations, coordinate containment actions, preserve evidence, and contribute to post-incident lessons learned Ensure least privilege/access governance: account management oversight, privileged access workflows, periodic access reviews, and audit compliance requirements Translate security requirements into implementation guidance that engineering teams can operationalize (clear, testable, and automatable where possible)

Qualifications Required qualifications Active Top Secret clearance with SCI eligibility 5 years with BS/BA; 3 years with MS/MA; 4 additional years of experience may be considered in lieu of degree Security+ or equivalent certification (DoD 8570 IAM Level II) Experience with SAP assessments and authorizations 3+ years experience with Authority to Operate (ATO) process, continuous monitoring, POA&Ms, Security Authorizations (SA), NIST 800-37, NIST 800-53 Rev4/ Rev5, working with Information System Owners (ISO) and Program Managers (PM) Experience with SCAP, STIGs, and other compliance tools Proven written and verbal communication skills, and the ability to work well with team members Preferred qualifications Experience with SCRUM methodologies Experience with Ongoing Authorizations Experience with Splunk and/or other auditing compliance tools Experience with ACAS, Nessus, and/or other vulnerability scanners Peraton Overview Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy.

Visit peraton.com to learn how we're keeping people around the world safe and secure. Target Salary Range $104,000 - $166,000. This represents the typical salary range for this position.